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36
37#include "qquickdefaultdial_p.h"
38
39#include <QtCore/qmath.h>
40#include <QtGui/qpainter.h>
41#include <QtQuick/private/qquickitem_p.h>
42
43QT_BEGIN_NAMESPACE
44
45QQuickDefaultDial::QQuickDefaultDial(QQuickItem *parent) :
46 QQuickPaintedItem(parent)
47{
48}
49
50qreal QQuickDefaultDial::progress() const
51{
52 return m_progress;
53}
54
55void QQuickDefaultDial::setProgress(qreal progress)
56{
57 if (progress == m_progress)
58 return;
59
60 m_progress = progress;
61 update();
62}
63
64QColor QQuickDefaultDial::color() const
65{
66 return m_color;
67}
68
69void QQuickDefaultDial::setColor(const QColor &color)
70{
71 if (color == m_color)
72 return;
73
74 m_color = color;
75 update();
76}
77
78void QQuickDefaultDial::paint(QPainter *painter)
79{
80 if (width() <= 0 || height() <= 0)
81 return;
82
83 QPen pen(m_color);
84 pen.setWidth(8);
85 pen.setCapStyle(Qt::FlatCap);
86 painter->setPen(pen);
87
88 const QRectF bounds = boundingRect();
89 const qreal smallest = qMin(a: bounds.width(), b: bounds.height());
90 QRectF rect = QRectF(pen.widthF() / 2.0 + 1, pen.widthF() / 2.0 + 1, smallest - pen.widthF() - 2, smallest - pen.widthF() - 2);
91 rect.moveCenter(p: bounds.center());
92
93 // Make sure the arc is aligned to whole pixels.
94 if (rect.x() - int(rect.x()) > 0)
95 rect.setX(qCeil(v: rect.x()));
96 if (rect.y() - int(rect.y()) > 0)
97 rect.setY(qCeil(v: rect.y()));
98 if (rect.width() - int(rect.width()) > 0)
99 rect.setWidth(qFloor(v: rect.width()));
100 if (rect.height() - int(rect.height()) > 0)
101 rect.setHeight(qFloor(v: rect.height()));
102
103 painter->setRenderHint(hint: QPainter::Antialiasing);
104
105 const qreal startAngle = (140 + 90);
106 const qreal spanAngle = (m_progress * 280) * -1;
107 QPainterPath path;
108 path.arcMoveTo(rect, angle: startAngle);
109 path.arcTo(rect, startAngle, arcLength: spanAngle);
110 painter->drawPath(path);
111
112 rect.adjust(xp1: -pen.widthF() / 2.0, yp1: -pen.widthF() / 2.0, xp2: pen.widthF() / 2.0, yp2: pen.widthF() / 2.0);
113 pen.setWidth(1);
114 painter->setPen(pen);
115
116 path = QPainterPath();
117 path.arcMoveTo(rect, angle: 0);
118 path.arcTo(rect, startAngle: 0, arcLength: 360);
119 painter->drawPath(path);
120}
121
122QT_END_NAMESPACE
123

source code of qtquickcontrols2/src/imports/controls/qquickdefaultdial.cpp